JEE Main & Advanced Chemistry Structure of Atom Question Bank Quantum number, Electronic configuration and Shape of orbitals

  • question_answer The number of unpaired electrons in carbon atom in excited state is                                       [MNR 1987]

    A)                 One      

    B)                 Two

    C)                 Three   

    D)                 Four

    Correct Answer: D

    Solution :

               \[{{C}_{6}}=1{{s}^{2}},\,2{{s}^{2}}2{{p}^{2}}\] (Ground state)                          \[=1{{s}^{2}}\,2{{s}^{1}}\,2P_{x}^{1}\,2p_{y}^{1}\,2p_{z}^{1}\] (Excited state)                                 In excited state no. of unpaired electron is 4.


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